Again, it’s all about saliva: Chewing gum increases its production. But not just any pack will do. “Gum that contains sugar actually feeds the bacteria that generate sulfur compounds,” says Robin Lucas, a dentist in Hoboken, New Jersey. Instead, look for gums that contain natural sweeteners called sugar alcohols, such as xylitol and sorbitol. Sugar-free mints also stimulate saliva production and temporarily mask odor. GOOD TO KNOW: If you are not accustomed to sugar-free gum, go easy at first. For some people, sugar alcohols can cause stomach discomfort, bloating and gas.